School spokesman Steve Roe told The Associated Press that Parker died early Monday. Roe says more details should be available later in the day.

Parker began his college coaching career in 1968. He made stops at Wake Forest, Minnesota, Illinois, East Carolina, Michigan State and Vanderbilt. He spent his last 13 seasons at Iowa, where he developed a reputation as one of the country’s top coordinators.

The Hawkeyes were often built around Parker’s fundamentally sound defenses. The Hawkeyes finished in the top 10 nationally in scoring defense four times under Parker, who retired following the 2011 season.